What are the taboos in Feng Shui when building a house by filling in subsidence areas?

You did not explain the specific conditions of the sinkhole and its surroundings.

In addition, you have to ensure that the atmosphere of this place is not too bad.

It also depends on whether the geology of the place is loose and loose. In short,

The foundation of the house you build must be very stable. You can consider raising the foundation by half a meter.

At the same time, use cement for irrigation. In this case there will be no problem.

From now on, it depends on the impact of the surrounding environment.